In order to fly an R44 your flight review must be done in an R44, so yes you do. I myself must do 2 flight reviews because I fly both the R22 and the R44. SFAR 73 sucks!!!
Its SFAR 73 section 2.(c)(2) if you want to look? And more good news! If your total helicopter time is less than 200 hrs then that flight review will only be valid for 12 months. That's section 2. (b)(2)(i) and (ii).